Internal-combustion engine.



0. 0. `STORLE. INTBRNALooE-*us'rron ENGINE.

Arrmommn FILED snrnls, 1941. 1,068,710. y

Patented July 29, 1913.

v XM iunrrare rarita orme,

OLE O. STORLE, OF TACOMA, WASHINGTGN.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented July 29, 1913.

Application filed September 15, 1911. l Serial No. 649,416.

T0 all whom @'15 may concern,

Be it known that l, OLE O. S'ronLn, a citi- Zen ot the United States,residing at Tacoma, in the county of lierce and State of lllvashington,have invented certain new and useful Improvements in Internal-CombustionEngines, of which the following is a specification, reference being hadto the accompanying drawing, forming a part thereofl The main objects ofthis invention are to utilize to the fullest extent the expansive forceof the exploded charges 4and thereby economize power and prevent orreduce the noise of theexhaust without a muffler; to avoid dead centers,and generally to improve the construction and operation of engines ofthis class.

It consists in the construction, arrangement and combination of parts ashereinafter particularly described and pointed out in the claims.

In the accompanying drawinflike characters designate the same parts inthe several figures.

Figure l is a vertical longitudinal section 'of an engine embodyingtheinvention, the pistons being shown in the positions they occupy attheend of the suction stroke; Fig. 2 is a similar section showing t-hepistons in the positions they occupy-at the end of the compression andat the end of the exhaust stroke; Fig. 3 is a similar section showingthe pistons in the rpositions they occupy at the end of the explosion orworking stroke; and Fig. 4 is a plan view of the engine.

The cylinder a, which is comparatively long and open at the ends, isprovided in the usual manner with a water or cooling jacketb, and withaninwardly projecting shoulder c forming a stop for one of the pistons,as `hereinafter explained.

Z and e are oppositely working trunk pistons titted in the cylinder onopposite sides of the shoulder or stop c with their closed ends towardthe middle of fthe cylinder, which is provided with inlet and exhaustports opening into the space which forms "the explosion or combustionchamber between the two pistons when they are at the inner limits oi'their movement, only the cxhaustvport f being shown.` The engine is alsoprovided with inlet and exhaust valves, valve operating mechanism andignitingl devices, which may be of the usual or any suitableconstruction, and are not shown.

Adjacent to one end of the cylinder the engine is provided with a crankg which has a longitudinally shifting connection with the piston c,whercby said piston is permitted to dwell at. the inner limit of itstravel during-the suctionstroke of the other piston (l, thereby reducingthe space for the admission of the explosive charge on the suctionstroke of the piston (l and permitting it to expand when exploded duringthe simultaneous outward movementI of both pistons into a much larger'space, so as to utilize to the fullest extent the explosive force ot thecharge,I and without the intervention of a muttler, to avoid ormaterially reduce the noise produced by the exhaust. This shiftingconnection between the crank g and piston c may be made as shown, bymeans of a head or plunger 7L fitted and movable length-A wise in thepiston c and directly connected by a rod or pitman c' with the crank g.

To insure the dwelling of the piston c at the inner limit of its travelduring the suction stroke of the piston d, the plunger 7L is formedthrough its inner end, which is otherwise closed, with one or more portsor passages j, and is provided with an inwardly opening valve 7c whichcloses said ports or passages when the plunger moves inward. To permitot the free inward movement of the plunger in the piston c and at thesame time prevent it from coming into violent contact therewith at thein` ner limit of its stroke, the pif Lon e is formed with one or morelongitudinal air passages Z leading from the interior thereof at anintermediate point in the stroke of the plunger /z` through the outerend of the piston to the atmosphere.

The ypiston (Z connected by a rod or pitinan m with oneI arm of a. levern, which is fulcruined in the frame or bed of the engine at the oppositeend troni the crank q, The other arm ot this lever is connected by a rodo with a crank pin p onthe lywheel t] of the engine, or on the crankshaft in line with the crank g with which the piston c is connectedthrough the plunger' 7L. and rod ln the operation of the engine, whichis ot' the tour-cycle type, during the suction stroke of the pistonwhich draws an cxplosive chargeinto the cylinder, the piston c is heldas shown in Fig. l, at the inner limit otits movement by the vacuum orpartial vacuum thus produced in the cylinder by the piston d; againstthe shoulder c, lwhile 'working' pistons fitted therein, a plunger thehead or plunger 7L is drawn outward. During the return stroke of thepiston Z and' plunger Izy the charge is compressed between the pistonsai and e, the outward movement of the piston e by the compression 'ofthe chargebeing resisted by the inward movement of the plunger h and thecompression of the air therein by said plunger. The charge being ignitedand exploded when the pistons and plunger are at or near the innerlimits of their travel, forces both pistons Z and e simultaneouslyoutward as shown in Fig. 3, and acts through their connectionsherein'before described, to turn the crank shaft, the-piston e andplunger h, operating together as one, through ,the connecting rod z onthe crank g on the explosion or working stroke.. The space between thepistons (Z and e into which the chargeexpands'after its explosion, asshown in Fig. 3 Abeing much greater than the space into which it is admitted on the suction stroke of the pist-on (Z, as shown in Fig. 1, theexpansive force of the charge is utilized to the fullest extent and itspressure being thus reduced, it escapes from the exhaust port withlittle or no noise.

The pistons d and e and the parts of the cylinder a in which they work,may be made ofwdiierent diameters instead of the'same diameter as shown,the engine may be provided for use in automobiles or other purposes witha number of cylinders, and various other changes in' the details ofconstruction and arrangement of parts may be made within the scope ofthe invention asdelined in the following claims.

I claim: 'p

l. In an internal combustion engine the combination of a cylinder, twooppositely working pistons fitted therein, and a crank connected withsaid pistons, one of the pistons having va longitudinally shiftingconnection with the crank and being adapted to dwell at the inner limitof its travel during the suction stroke of the other piston.

2. In an internal combustion engine the combination of a cylinder, twooppositely fitted and movable lengthwise within one of said pistons andprovided with a port and with an inwardly openingvalve'controllingV saidport, and a crank connected with said plunger and with the other piston,

3. In an internal combustion engine the combination of a cylinder,oppositely working pistons fitted therein, a plunger fitted and movablelengthwise in one piston which piston has an air passage leading from anintermediate point in the interior thereof to the atmosphere, and acrank 'connected with said plunger and with the other piston.

t. In an internal combustion engine vthe combination of a cylinder,oppositely working pistons fitted therein, a plunger iitted and movablelengthwise in one piston which piston has an air passage leading fromthe interior thereof at an intermediate point in the stroke of theplunger to the atmosphere, said plunger having a portopening to theatmosphere from the interior of said piston, an inwardly opening valvecont-rolling said port, and a crank connected with said plunger and withthe other piston.

5. In an internal combustion engine the combination of a cylinder,oppositely workn ing pistons fitted therein, a crank Vat one end of theengine connected hy a rod with one piston, a lever at the other end ofthe engine having an arm connected by a Arod with the other piston'and arod connecting` the crank with the other arm of said lever both pistonsworking when forced apart to turn the crank.

6. In an internal combustion engine the combination of a cylindercomprising two parts each communicating with the other at one end,reciprocating pistons fitted therein, anda crank shaft connected withand adapted to be turned by the joint action of said pistons, one ofsaidpistons having a longitudinally shifting connection with the crankand being adapted to dwell at the limit of its travel towardtheintercommunieating ends of the cylinder parts while the other pistonmakes its suction stroke.

'In witness whereof I hereto affix my s ignature in presence of twowitnesses.

OLE O. STORLE.

lVitncsscs Giras. L. Goss, ALICE E. Goss.

